diff --git a/server/dist/index.js b/server/dist/index.js
index 0b249f2..fe1564b 100644
--- a/server/dist/index.js
+++ b/server/dist/index.js
@@ -12,6 +12,7 @@ Object.defineProperty(exports, "__esModule", { value: true });
 require("dotenv").config();
 const axios = require('axios').default;
 const cheerio = require('cheerio');
+const semver = require('semver');
 const express = require("express");
 const bodyParser = require("body-parser");
 const status = require("http-status");
@@ -113,11 +114,35 @@ class FE_Charts {
                 limit: 1,
                 order: [["Dttm_Last_Update", "DESC"]],
             }).then(results => {
-                version = results;
+                version = results[0].version;
             }).catch(err => FE_Charts.logError(err));
             return version;
         });
     }
+    static getAllData() {
+        return __awaiter(this, void 0, void 0, function* () {
+            const version = yield this.getCatalogueLastVersion();
+            const characters = yield FE_Charts.getAllCharacters();
+            const characterGrowthRates = yield FE_Charts.getAllCharactersGrowthRates();
+            const classesGrowthRates = yield FE_Charts.getAllClassesGrowthRates();
+            const classes = yield FE_Charts.getAllClasses();
+            const genders = yield FE_Charts.getAllGenders();
+            const houses = yield FE_Charts.getAllHouses();
+            const restrictedClasses = yield FE_Charts.getAllRestrictedClasses();
+            const stats = yield FE_Charts.getAllStats();
+            return {
+                version: version,
+                characters: characters,
+                charGrowthRates: characterGrowthRates,
+                classGrowthRates: classesGrowthRates,
+                classes: classes,
+                genders: genders,
+                houses: houses,
+                restrictedClasses: restrictedClasses,
+                stats: stats,
+            };
+        });
+    }
 }
 exports.FE_Charts = FE_Charts;
 app.get('/', (req, res) => {
@@ -129,24 +154,30 @@ app.get('/version', (req, res) => {
     });
 });
 app.get('/all', (req, res) => __awaiter(void 0, void 0, void 0, function* () {
-    const characters = yield FE_Charts.getAllCharacters();
-    const characterGrowthRates = yield FE_Charts.getAllCharactersGrowthRates();
-    const classesGrowthRates = yield FE_Charts.getAllClassesGrowthRates();
-    const classes = yield FE_Charts.getAllClasses();
-    const genders = yield FE_Charts.getAllGenders();
-    const houses = yield FE_Charts.getAllHouses();
-    const restrictedClasses = yield FE_Charts.getAllRestrictedClasses();
-    const stats = yield FE_Charts.getAllStats();
-    res.status(status.OK).send({
-        characters: characters,
-        charGrowthRates: characterGrowthRates,
-        classGrowthRates: classesGrowthRates,
-        classes: classes,
-        genders: genders,
-        houses: houses,
-        restrictedClasses: restrictedClasses,
-        stats: stats,
-    });
+    const data = yield FE_Charts.getAllData();
+    res.status(status.OK).send(data);
+}));
+app.post('/update', (req, res) => __awaiter(void 0, void 0, void 0, function* () {
+    const clientVersion = req.body.version;
+    if (clientVersion) {
+        FE_Charts.getCatalogueLastVersion().then((version) => __awaiter(void 0, void 0, void 0, function* () {
+            try {
+                if (semver.gt(version, clientVersion)) {
+                    const data = yield FE_Charts.getAllData();
+                    res.status(status.OK).send(data);
+                }
+                else {
+                    res.status(status.OK).send(); // Catalogue up-to-date
+                }
+            }
+            catch (e) {
+                res.status(status.INTERNAL_SERVER_ERROR).send(e.message);
+            }
+        }));
+    }
+    else {
+        res.status(status.BAD_REQUEST).send("'version' parameter undefined");
+    }
 }));
 // Don't start the server if we're importing some data
 if (process.argv.find(x => x == argImport) == undefined) {
diff --git a/server/dist/index.js.map b/server/dist/index.js.map
index 4001ada..fc5bff5 100644
--- a/server/dist/index.js.map
+++ b/server/dist/index.js.map
@@ -1 +1 @@
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\ No newline at end of file
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diff --git a/server/package.json b/server/package.json
index 813a9dd..97f5fc8 100644
--- a/server/package.json
+++ b/server/package.json
@@ -33,6 +33,7 @@
     "express": "^4.17.1",
     "http-status": "^1.4.1",
     "mysql2": "^2.0.1",
+    "semver": "^6.3.0",
     "sequelize": "^5.21.2"
   },
   "devDependencies": {
diff --git a/server/src/index.ts b/server/src/index.ts
index 62dd9d8..afcec6c 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -1,6 +1,7 @@
 require("dotenv").config();
 const axios = require('axios').default;
 const cheerio = require('cheerio');
+const semver = require('semver');
 import * as express from "express";
 import * as bodyParser from "body-parser";
 import * as status from "http-status";
@@ -9,7 +10,7 @@ const {Catalogue, Character, CharacterGrowthRate, ClassGrowthRate, FE_Class, Gen
 
 const app = express();
 const port = process.env.NODE_PORT || 3000;
-const argImport:string = "importing";
+const argImport: string = "importing";
 
 app.use(bodyParser.urlencoded({extended: false}));
 app.use(bodyParser.json());
@@ -99,10 +100,34 @@ abstract class FE_Charts {
             limit: 1,
             order: [["Dttm_Last_Update", "DESC"]],
         }).then(results => {
-            version = results
+            version = results[0].version;
         }).catch(err => FE_Charts.logError(err));
         return version;
     }
+
+    static async getAllData() {
+        const version = await this.getCatalogueLastVersion();
+        const characters = await FE_Charts.getAllCharacters();
+        const characterGrowthRates = await FE_Charts.getAllCharactersGrowthRates();
+        const classesGrowthRates = await FE_Charts.getAllClassesGrowthRates();
+        const classes = await FE_Charts.getAllClasses();
+        const genders = await FE_Charts.getAllGenders();
+        const houses = await FE_Charts.getAllHouses();
+        const restrictedClasses = await FE_Charts.getAllRestrictedClasses();
+        const stats = await FE_Charts.getAllStats();
+
+        return {
+            version: version,
+            characters: characters,
+            charGrowthRates: characterGrowthRates,
+            classGrowthRates: classesGrowthRates,
+            classes: classes,
+            genders: genders,
+            houses: houses,
+            restrictedClasses: restrictedClasses,
+            stats: stats,
+        };
+    }
 }
 
 app.get('/', (req, res) => {
@@ -116,25 +141,29 @@ app.get('/version', (req, res) => {
 });
 
 app.get('/all', async (req, res) => {
-    const characters = await FE_Charts.getAllCharacters();
-    const characterGrowthRates = await FE_Charts.getAllCharactersGrowthRates();
-    const classesGrowthRates = await FE_Charts.getAllClassesGrowthRates();
-    const classes = await FE_Charts.getAllClasses();
-    const genders = await FE_Charts.getAllGenders();
-    const houses = await FE_Charts.getAllHouses();
-    const restrictedClasses = await FE_Charts.getAllRestrictedClasses();
-    const stats = await FE_Charts.getAllStats();
+    const data = await FE_Charts.getAllData();
+    res.status(status.OK).send(data);
+});
 
-    res.status(status.OK).send({
-        characters: characters,
-        charGrowthRates: characterGrowthRates,
-        classGrowthRates: classesGrowthRates,
-        classes: classes,
-        genders: genders,
-        houses: houses,
-        restrictedClasses: restrictedClasses,
-        stats: stats,
-    });
+app.post('/update', async (req, res) => {
+    const clientVersion = req.body.version;
+
+    if (clientVersion) {
+        FE_Charts.getCatalogueLastVersion().then(async (version) => {
+            try {
+                if (semver.gt(version, clientVersion)) {
+                    const data = await FE_Charts.getAllData();
+                    res.status(status.OK).send(data);
+                } else {
+                    res.status(status.OK).send(); // Catalogue up-to-date
+                }
+            } catch (e) {
+                res.status(status.INTERNAL_SERVER_ERROR).send(e.message);
+            }
+        });
+    } else {
+        res.status(status.BAD_REQUEST).send("'version' parameter undefined");
+    }
 });
 
 // Don't start the server if we're importing some data